zs and Ipf at d/b on schedule of test results

[crow11]

hi all just a quick question about the above title,go easy with me if i am missing something obvious here lol, why do you have to put zs at d/b on the eicr(got a copy of part p doctor and on his sample of schedule of test results he as put the ze figure in there and then put ze in brackets at the side of it,if you was to do a zs test at d/b do you just do it at the main switch line in with switch open and then obviously to main cpc bar in d/b, obviously you could expect to get a lower reading than the ze because of parallel paths, and the next 1 Ipf at d/b wouldn't this just be the same as the pfc you put down on the first page of the eicr so why do you have to put it down twice cheers

 

[keniff]

Your ze may not be at the board, maybe a scenario like fused isolator then to consumer unit, your ze would be at fused isolator and then you would have a db zs at the consumer unit

 

[Deleted member 26818]

The reason why Zs is now required to be recorded on the schedule, is because recording a value that has already been recorded, is pointless.
Zs is very likely to be different from Ze.
Also this now allows the schedule to be used where there are multiple Dbs without having to alter the Ze to Zs.